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相关概念视频

Mesh Analysis for AC Circuits01:12

Mesh Analysis for AC Circuits

315
In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
315
Maximum Power Transfer01:16

Maximum Power Transfer

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Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...
188
Ampere-Maxwell's Law: Problem-Solving01:17

Ampere-Maxwell's Law: Problem-Solving

478
A parallel-plate capacitor with capacitance C, whose plates have area A and separation distance d, is connected to a resistor R and a battery of voltage V. The current starts to flow at t = 0. What is the displacement current between the capacitor plates at time t? From the properties of the capacitor, what is the corresponding real current?
To solve the problem, we can use the equations from the analysis of an RC circuit and Maxwell's version of Ampère's law.
For the first part of...
478
Continuous Charge Distributions01:17

Continuous Charge Distributions

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Imagine a bucket of water. It contains many molecules, of the order of 1026 molecules. Thus, although it contains discrete elements (molecules) at the microscopic level, macroscopically, it can be considered continuous. Small volume elements of water, infinitesimal compared to the bulk of the bucket's volume, still contain many molecules. Under this framework, quantized matter is approximated as continuous for practical purposes.
The electric charge can also be subjected to an analogical...
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Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

624
In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
624
Maxwell-Boltzmann Distribution: Problem Solving01:20

Maxwell-Boltzmann Distribution: Problem Solving

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Individual molecules in a gas move in random directions, but a gas containing numerous molecules has a predictable distribution of molecular speeds, which is known as the Maxwell-Boltzmann distribution, f(v).
This distribution function f(v) is defined by saying that the expected number N (v1,v2) of particles with speeds between v1 and v2 is given by
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相关实验视频

Updated: May 13, 2025

Author Spotlight: Optimization of Airflow Velocities in Battery Cooling Systems for Enhanced Thermal Performance and Reduced Energy Consumption
10:36

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优化无线充电系统的多元算法,结合自适应压缩因子和考希变量.

Chunming Wen1,2, Zhen Chen3, Huilin Ma3

  • 1Guangxi Minzu University, No. 188, Daxue East Road, Nanning, 530000, Guangxi Province, China. wenchunming@gxmzu.edu.cn.

Scientific reports
|April 15, 2025
PubMed
概括

这项研究优化了磁联共振无线电力传输 (MCR WPT) 系统,以提高效率和功率. 优化的系统实现了增强的长距离性能,具有0.25m的最佳传输距离和127W的最大输出功率.

关键词:
适应性压缩因子适应性压缩因子考契变异的变化 考契变化多目标参数优化多目标参数优化多元宇宙算法 多元宇宙算法无线充电 无线充电

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科学领域:

  • 电气工程 电气工程
  • 电力电子 电力电子 电力电子
  • 无线电力传输是无线电力传输.

背景情况:

  • 现有的磁联共振无线电力传输 (MCR WPT) 系统由于距离和负载等因素而面临传输效率和功率的限制.
  • 在MCR WPT系统中同时优化所有性能参数是具有挑战性的.

研究的目的:

  • 为MCR WPT系统提出和验证一个多目标参数优化方法.
  • 为了提高MCR WPT系统的传输效率,输出功率和长距离性能.

主要方法:

  • 分析LCC-S拓和同等电路,以确定影响性能的关键参数.
  • 应用多目标多节优化器 (MOMVO) 算法,修改虫洞更新概率 (对数增长).
  • 将自适应性压缩因子和考希方差纳入MOMVO算法,以改善汇率和逃离局部最佳值.

主要成果:

  • 优化的MCR-WPT系统显著提高了长途传输性能.
  • 该系统实现了0.25米的最佳传输距离.
  • 最大输出功率达到了127瓦.

结论:

  • 建议的多目标参数优化有效地提高了MCR WPT系统的性能.
  • 修改后的MOMVO算法为优化复杂的WPT系统提供了强大的方法.
  • 实验验证证了优化的MCR-WPT系统原型的增强效率和功率交付.